C6 Shift Points
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From: St. Louis, MO
C6 Shift Points
I came across a post from a few years back about changing the shift points for a C6 transmission. The post mentioned something about changing the length of a "rod" behind the modulator valve. I'm new to this stuff so if someone would explain it a little more I would appreciate it.
I want to change my shift points to somewhere around 25 and 45mph if possible but I can't afford an aftermarket skift kit.
I also heard that it's possible to go with a smaller modulator valve, say one for a C4, to fool the transmission into shifting later. Is this also true?
If anyone has information or even an article on this topic, it would help me in understanding a little better.
-Chris
I want to change my shift points to somewhere around 25 and 45mph if possible but I can't afford an aftermarket skift kit.
I also heard that it's possible to go with a smaller modulator valve, say one for a C4, to fool the transmission into shifting later. Is this also true?
If anyone has information or even an article on this topic, it would help me in understanding a little better.
-Chris
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Joined: May 2003
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C6 Shift Points
Yes you can change the modulator rod to adjust shift timing. Longer rod = later and harder shifts. Shorter = early and soft.
But you might just pick up an aftermarket adjustable modulator for C-6. There is a screw in the vacumn nipple. Turn it clockwise (in) for later and harder shifts and out for softer earlier shifts. Don't lose the rod behind the modulator when you change it.
But you might just pick up an aftermarket adjustable modulator for C-6. There is a screw in the vacumn nipple. Turn it clockwise (in) for later and harder shifts and out for softer earlier shifts. Don't lose the rod behind the modulator when you change it.
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Joined: May 2003
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From: Joliet, Illinois
C6 Shift Points
Like he said, pick up an aftermarket adjustable modulator for C-6. There is a screw in the vacumn nipple. Turn it clockwise (in) for later and harder shifts and out for softer earlier shifts. Don't lose the rod behind the modulator when you change it.
However, if you do lose the rod, like I did, it can be duplicated by using a .125 diamiter rod that's 1.657"long.
However, if you do lose the rod, like I did, it can be duplicated by using a .125 diamiter rod that's 1.657"long.
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Joined: May 2003
Posts: 1,242
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From: Joliet, Illinois
C6 Shift Points
What is the difference in performance between an adjustabe modulator or installing a B&M shift kit?
B&M shift kit = faster firmer shifts, more pressure applying the clutch packs so they can handle more HP, less overlap/wear and tear.
adjustabe modulator = easily fine tuning your shift points, the other option is to swap various length modulator application rods testing your shift points with each
Both is best!
B&M shift kit = faster firmer shifts, more pressure applying the clutch packs so they can handle more HP, less overlap/wear and tear.
adjustabe modulator = easily fine tuning your shift points, the other option is to swap various length modulator application rods testing your shift points with each
Both is best!
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